Prepatellar Bursitis/abscess? Will the fluid go away?

A couple of weeks ago I hurt my knee while I was working on my car. I was on my hands and knees alot while I was working on my car. I didn't really hurt it bad, it just hurt for a couple of days from kneeling on the concrete driveway. A few days later I noticed that my knee cap was super swollen. I went to the doctor and she said it was prepatellar bursitis that caused an abscess of fluid to build up from the inflammation. It didn't hurt at all but there was a ton on fluid on top of my knee cap. She drained the fluid from the bursa, a small sac of fluid on top of the knee cap. It's been over a week, and the fluid has returned and filled up the bursa again. Still no pain, just fluid built up.

My question is will I have to get it drained again or will the fluid go away on it's own? It's quite painful to get the fluid drained and I know my doctor will get mad at me for not taking care of it properly, i.e. keeping it wrapped, taking anti-inflammatory drugs.